I'm really pissed off!...I never had any problem while leaving it for hours at the station and the supermarket, and it was stolen at the student village, right in front of the window of another student!...
It's not a matter of money (I was renting it 5000 yen, that is around 40 dollars, for 3 months...), but I don't like to know that this kind of thing happens in Japan too. I've talked about that with many people and it seems to eventually happens if you don't lock your bike. According to the Japanese people, it happens VERY often: obviously they don't know how it is in other countries, because a bicycle wouldn't stay more than an hour in Paris in such conditions!
That doesn't change my overall opinion about security in Japan, but still it's not anymore what it used to be...too much western influence maybe?...
Purikura is precisely the kind of thing you'll probably find just plain stupid until you try...and realize how fun it is! Provided you don't do it everyday...